<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb>
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片 -->

    <el-card>
      <!-- 提示框 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>

      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 标签栏 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>

            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 级联选择器 -->
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品参数" name="1">
            <!-- 绘制商品参数面板中的复选框 -->

            <!-- 渲染表单的item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 渲染复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>

          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- 上传图片组件不会自动携带token，需要手动设置请求头 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip" class="el-upload__tip">
                只能上传jpg/png文件，且不超过500kb
              </div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" @click="addGoods" class="btnClick"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewDialogVisible"
      width="30%"
    >
      <img :src="previewPath" alt="" class="previewStyle" />
    </el-dialog>
  </div>
</template>

<script>
import _ from "lodash";
export default {
  data() {
    return {
      // 进度条控制
      activeIndex: "0",
      // 表单数据
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,

        // 商品所属的分类数组
        goods_cat: [],
        // 上传的图片临时路径（对象）
        pics: [],
        // 商品详情
        goods_introduce: "",

        // 商品的参数
        attrs: [],
      },
      // 表单验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请输入商品分类", trigger: "blur" },
        ],
      },
      // 商品分类数据列表
      catelist: [],

      // 级联选择器的配置
      cateProps: {
        expandTrigger: "hover",
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      // 存储动态数据数组
      manyTableData: [],

      // 存储静态数据数组
      onlyTableData: [],

      // 图片上传后台的地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",

      // 图片上传组件的headers请求头对象
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },

      // 图片的真正地址
      previewPath: "",
      // 控制图片预览对话框的显示与隐藏
      previewDialogVisible: false,
    };
  },

  created() {
    // 商品分类数据列表
    this.getCateList();
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$axios.get("categories");
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败");
      }
      this.catelist = res.data;
      // console.log(res.data);
      console.log(this.catelist);
    },

    // 级联选择器选中项发生改变的时候触发函数
    handleChange() {
      console.log(this.addForm.goods_cat);
      // 只允许选中三级商品分类
      if (this.addForm.goods_cat.length !== 3) {
        return (this.addForm.goods_cat = []);
      }
    },

    // 阻止标签页的切换
    beforeTabLeave(activeName, oldActiveName) {
      // activeName 即将进入的标签页
      // oldActiveName 即将离开的标签页
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },

    // 获取动态参数数据(被选中时，触发)
    async tabClicked() {
      // console.log(this.activeIndex);
      if (this.activeIndex === "1") {
        // 发起请求获取动态参数数据
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "many" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数失败");
        }
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
        console.log(this.manyTableData);
      }
      // 获取静态属性
      if (this.activeIndex === "2") {
        const { data: res } = await this.$axios.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: "only" },
          }
        );
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态数据失败");
        }

        this.onlyTableData = res.data;
        console.log(this.onlyTableData);
      }
    },

    // 处理图片的预览效果
    handlePreview(file) {
      console.log(file);

      this.previewPath = file.response.data.url;
      this.previewDialogVisible = true;
    },
    // 处理移除图片的操作
    handleRemove(file) {
      console.log(file);
      //  1.获取将要删除的图片的临时路径
      //  2.从 pics数组中，找到这个图片对应的索引值
      //  3.调用数组的splice方法把图片信息对象，从pics数组中移除
      const filePath = file.response.data.tmp_path;

      // findIndex() 但数组中的元素在测试条件时返回true时，findIndex()返回符合条件的第一个元素的索引位置，不符合则返回-1
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
      console.log(this.addForm);
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      // 1.拼接得到一个图片信息对象
      // 2.将图片信息对象，push到pics数组中
      // console.log(response);
      const picInfo = {
        pic: response.data.tmp_path,
      };
      this.addForm.pics.push(picInfo);
      console.log(this.addForm);
    },

    // 点击事件
    addGoods() {
      console.log(this.addForm);
      // 在添加表单之前先进行预验证
      this.$refs.addFormRef.validate(async(valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项！！！");
        }

        // 执行添加的业务逻辑  深拷贝 lodash cloneDeep()
        const formInfo = _.cloneDeep(this.addForm);
        formInfo.goods_cat = formInfo.goods_cat.join(",");

        //  处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(","),
          };

          this.addForm.attrs.push(newInfo);
        });

        // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        formInfo.attrs = this.addForm.attrs;
        console.log(formInfo);

        // 发起post请求
        const {data:res} =  await this.$axios.post('goods',formInfo);
        if(res.meta.status!==201){
          return this.$message.error("商品创建失败");
        }
        this.$message.success("商品创建成功");
        this.$router.push('/goods');

      });
    },
  },
};
</script>

<style scope>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}

.previewStyle {
  width: 100%;
}
.btnClick {
  margin-top: 15px;
}
</style>